Just to add some thoughts, but the Romans already have a quite unified and bland roster for their campaigns. Most if not all of their infantry is made of a single or two infantry units, no matter the reforms and I found out that other factions have a far more diverse roster and compel me to use them. If they had to cut any part of the Augustan roster they could do it with the Ala Imperatoria (keeping the old roman regionals), the Equites Praetoriani or make the Romani use the greek siege weapon slots, but cutting down too severely will already impact a very restricted roster in practical terms. That's why we see mods such as the konny's allied legions being applied: there is simply a lack of diversity in any Roman army. Whether or not this is historical is a different matter, but fact is that the "lots and lots of units" argument simply doesn't convince me.
And Methuselah know that without that "shabby" city on the Tiber you would probably have no modern legal system, no Republican government, no well developed plumbing systems, no modern civilization, no Christianity, no political and natural sciences (spread by them) and many other things you praise and depend upon. Like it or not, Rome came to dominate the Classical world and no amount of cultural relativism will erase their contributions to society and culture as a whole until our days.
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